Gun control is not about preventing crimes

If it were to be the case, then how does this guy manage to get a gun anyway even though it was illegal to sell one to him on multiple counts?

To expand the thought a bit further:  "fighting global warming" isn't about fighting global warming.  It is far more than that, in my opinion.  It is about changing an entire social-economic-belief system.

To expand it even further:  you cannot believe these people when they say something.  So, if they say that gun control will stop this type of crime, then please explain why that the law that is already on the books WAS NOT ENFORCED.

In order to stop mass murders like this, people are going to have to take control over their own lives.  Turning to the government won't do the job, especially when the government won't do they job that they already have.